<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>取消请求</title>
  </head>
  <body>
    <button>发送请求</button>
    <button>取消发送</button>

    <script>
      const btns = document.querySelectorAll("button");
      let xhr = null;

      btns[0].onclick = function () {
        xhr = new XMLHttpRequest();
        xhr.open("GET", "http://127.0.0.1:8080/delay");
        xhr.send();
      };

      //   abort
      btns[1].onclick = function () {
        xhr.abort();
      };
    </script>
  </body>
</html>
